protocols Flashcards
what are protocols
- rules that define methods of communicating data between 2 or more digital devices
- they ensure the transmission of data always follows a set procedure
TCP/IP (transmission control protocol and internet protocol)
- the are used together as the basic communication language of internet
- data sent over internet is broken into ‘packets’ to enable it to be sent more efficiently and each packet is sent individually then reassembled in the end
TCP is used for..
- to create the packets and reassemble them at the end
IP is used for..
- to route packets to the intended computer by using computer’s IP address
Email; simple mail transfer protocol (SMTP)
- transfers emails between mail servers
Email; post office protocol 3 (POP3)
- to retrieve emails from the email server
- allows us to download messages to our client software for online reading
Email; internet message access protocol (IMAP)
- retrieve emails from the mail server
syncs emails to the email server instead of downloading it
voice and video calls; session initiation protocol (SIP)
- used to create and control and end VOIP connections
voice and video calls; real time transport protocol (RTP)
- designed to transfer audio and video over IP based networks
web pages: hypertext transfer (HTTP)
- allow web servers and browsers to transfer files over the internet
- it’s how we access the world wide web
web pages: HTTPS
- secure version of HTTP
- it uses public key cryptography to encrypt communications between web browser and server
web pages file transfer (FTP)
- transfer files over a network
- it is used to upload files to a server and it downloads larger files
security protocols; SSL and TLS
- used to ensure that transactions over networks are kept safe
- SSL is being phased out and replaced by TLS
